Abstract

Cyperus esculentus L, Cyperus eragrostis Lam., Laportea aestuans (L.) Chew and Amaranthus dubius Mart. Ex Thell. Were recently found naturalized in eastern Taiwan. The present study gives descriptions and line drawings of the four species. In addition, their distribution and notes on ecology and taxonomy are provided.

中文摘要

黃土香 (Cyperus esculentus L.)、頭穗莎草(Cyperus eragrostis Lam.)、腺花桑葉麻（Laportea aestuans (L.) Chew）及假刺莧 (Amaranthus dubius Mart. Ex Thell.) 為新歸化於臺灣東部之雜草。本文描述這四種植物，除提供形態、解剖圖外並報告其分布、生態及與近似種之差異。

Keyword: Cyperaceae, Urticaceae, Amaranthaceae, Cyperus esculentus, Cyperus eragrostis, Laportea aestuans, Amaranthus dubius, taxonomy, weeds, naturalized plant, 莎草科, 蕁麻科, 莧科, 黃土香,頭穗莎草,腺花桑葉麻,假刺莧,分類學, 雜草, 歸化植物。